package thread;

import java.util.concurrent.locks.ReentrantLock;

public class Demo15_ReentrantLock {
    private static int cnt = 0;
    public static void main(String[] args) throws InterruptedException {
        ReentrantLock locker = new ReentrantLock(true);
        Thread t1 = new Thread(new Runnable() {
            @Override
            public void run() {
                for(int i = 0; i < 50000; ++i){
                    locker.lock();
                    ++cnt;
                    locker.unlock();
                }
            }
        });
        Thread t2 = new Thread(new Runnable() {
            @Override
            public void run() {
                for(int i = 0; i < 50000; ++i){
                    locker.lock();
                    ++cnt;
                    locker.unlock();
                }
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println(cnt);
    }
}
